Alabama linebacker Nico Johnson warms up before the start of an NCAA college football game between Missouri and Alabama Saturday, Oct. 13, 2012, in Columbia, Mo. (AP Photo/Jeff Roberson)

Johnson's mission leading up to Saturday's Senior Bowl is to show "that I'm a much better player than what people think."

By some counts, the two-time defending national champion Crimson Tide will have as many as four players chosen in the first round of the NFL draft. Senior Bowl participants Johnson, tight end Michael Williams, safety Robert Lester and longsnapper Carson Tinker aren't that highly rated.

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